Brake-shoe.



W. L. POST.

BRAKE SHOE.

APPLICATlON man lULV 25. 1914.

Patented May18, 1915.

WITNESSES:

ATTORNEY THE NORRIS PETERS 60 PHOTG-LITHKI, WASHINGTON. D C.

WILLIAMLADUE resin, or com) SPRING, NEW YORK.

BRAKE-SHOE.

Specification of Letters Patent. Patented May 1%, 1915.

Application filed July 25, 1914. Serial No. 853,041.

To all whom it may concern:

Be it known that I, WILLIAM LADU'E Posr, a citizen of the United States,and resident of Cold Spring, in the county of Putnam and State of NewYork, haveinvented a certain new and useful Brake-Shoe, of which thefollowing is a specification.

This invention relates to brakes for Wheeled vehicles, and its object isto provide a brake that is marked by simplicity while retaining thehighest efiiciency.

The objects are attained by the means set forth in this specificationand the accompanying drawings.

Reference being made to the drawings, Figure 1 is a front elevation ofthe brake shoe, with the rubbing shoe omitted. Fig. 2 is a reverse viewof the shoe as shown in Fig. 1. Fig. 3 is a longitudinal section of thebrake shoe. Fig. 4: is a longitudinal sec tion of the brake shoe in itsnormal position. Fig. 5 is a perspective view of the adjusting collar.

This brake shoe comprises only five parts, exclusive of the shaft: acasing a, collar 5 that holds the casing in place on the shaft, a spiralspring (Z which retains the shoe in a normal position and admits of theshoe adapting itself to the face of a wheel, a rubbing shoe u heldbetween the flanges of the casing, and a set-screw in the collar. Thebrake shoe is carried upon the shaft 8 which may form a part of anysuitable braking mechanism.

The casing a is asingle casting, or it may be stamped or forged intoshape. It comprises a curved back with flanges r a", the outer edges ofthe flanges having over hanging flanges t 25, Figs. 1 and 4, theopposite flanges forming a dove-tail between them, for holdingtherubbing shoe u shown in Fig. 8. To provide bearing surfaces adequate forlong service shoulders Z Z are provided inside the casing around theshaft. A collar 7) shown in perspective in Fig. '5, is adjustable on theshafts. The collar has a segmental projection m on its periphery, and aslot 0 in the back of the casing, Figs.

1, 2, 3, l receives the collar projection, as,

most clearly shown in Figs. 3 a. A spiral spring (Z is placed within thecasing on the shaft beside the collar. A set-screw c in the collarserves to secure the collar in position on the shaft.

03 of the spring is hooked, as at 6, Figs. 1,

A lug i is provided at one end of the casing to which the long end.

- 2, and3. The other end (Z of the spring en- I gages over one shoulderof the collar pro j ection m as in the first four figures.

In assembling this brake shoe the collar" and spring are held in placewithin the casing the projection on, the collar within theslot in theback of the casing, and the shaft is passedtlirough the three parts. Oneend of the spiral spring is engaged with a shoulder of the collarprojection,'and the long end of the spring is hooked over the lug at theend of the casing. In Fig. 4 the long end of the spring is shown to beengaged with a hole in the casing, as at 6 The point at which the end alof the spring is secured is really immaterial so long as the tension ofthe spring upon'the casing is properly obtained. This fact isillustrated by the different positions in which the spring end d isshown in the drawings, and they are so shown in order to emphasize thispoint. The action of the spring is to turn the casing on the shaft andnormally to keep the shoulder 72 in the slot 0 against the shoulder 41of the projection m, as in Figs. 1, 2 and .4.

No special preparation of a shaft is required, other than to have asulficient length of it to fit the bores of the collar and the casingfor lateral adjustment of the brake shoe. Adjustments of the brake shoeare made entirely with the collar, and the collar is secured by theset-screw. The normal position of the brake shoe in relation to a wheelwill be as shown in Fig. l, the line of the shoe forward. The positionof the shoe against the wheel will be as in Fig. 3, the line torepresenting the wheel. It will be seenthat the collar projection m willthen be midway of the slot 0, allowing the shoe self adjustment againstthe wheel, the spring making it a firm adjustment.

Having described my invention, what I claim and desire to secure byLetters Patent, is V l 1 The combination in a brake shoe of a casing,means in the casing for holding a rubbing shoe, shaft bearings in thecasing to receive a shaft, a shaft through the casing, a collar on theshaft within the casing and a segmental projection on the collar, a slotin the back of the casing to admit the extension on the collar, a spiralspring on the shaft acting between the collar and the V casing, and aset-screw inthecollar. I

2. The combination comprlslng the auto matic adjusting parts of a brakeshoe, of a Copies 01' this patent inay be obtained for thecasing.

on the collar and a set-screw in thecollar, a slot in the back of thecasing to receive the projection on the collar, a spiral spring on theshaft Within the casing, a lug on the end of the casing, one end of thespring engaged with the collar projection the other end of I the springattached to the lug on the end of Signed at Cold Spring in the countycfPutnam and State of New York this 1Q day of July A D. 1914:. WILLIAMWitnesses: I

HAROLD Post, CLARENCE H. SARA} LADUE PosT.

five cents each, by addressing the Commissioner of Patents, Washington,D. c. f r Y

